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        General >> Problems >> Cooling Fans
        
(Message started by: Jim on Jun 14^th, 2006, 1:11pm)

Title: Cooling Fans
Post by Jim on Jun 14^th, 2006, 1:11pm

Blew the top hose last night, just after turning a/c off.
Checked it out this morning and only one fan was working with a/c on, and non at other times. Fan on drivers side is u/s, fuse blown and no response after
replacement.
I know that this would stop low speed operation but would it prevent high speed operation on over temperature or is the relay suspect as well. (incidently where is the relay?)

Title: Re: Cooling Fans
Post by Dave on Jun 14^th, 2006, 1:16pm

Don't think so, the working fan should run at high speed if required.

Why not leave it running for a while and see? (Keeping a close eye on the temp gauge).

Have a look at this:

http://www.fordscorpio.co.uk/coolfans.htm

The relay for the cooling fan is a long green one behind the drivers side headlight.

Cheers

Title: Re: Cooling Fans
Post by Jim on Jun 14^th, 2006, 1:56pm

Thanks Dave, I think it is a combination fault of a weak top hose and the u/s fan. It was OK while the low speed fans kept it at normal temperature. As the temperature increased, but before it reached the turn on point for the high speed fans, the additional pressure blew the hose. Waiting for hose from FMD and fans from ebay.

Title: Re: Cooling Fans
Post by sector-9 on Jun 14^th, 2006, 6:07pm

If you've got a multimeter then check the driver's side fan for continuity before replacing it. I replaced mine because it wouldn't run but the new one did the same, even though both the new one and the original ran when connected directly to the battery!

I eventually discovered (by accident) that the loom had burnt out where it passes in front of the radiator - this could explain the blown fuse and non-working fan when replaced. IIRC the driver's side fan has a permanent +12V supply to it, and the negative terminal is switched to either ground (high speed) or the positive terminal of the passenger side fan, which has a permanent ground connection at the other terminal, (low speed).

From your description it could be that either the relay is not grounded properley, or more likely, that the permanent live to the driver's side fan has failed like mine had.

Darren

Title: Re: Cooling Fans
Post by Jim on Jun 22^nd, 2006, 12:59pm

Continuity checked OK but the top fan was tight. Managed to free it up for testing but bearing was shot. Checked operation of system and working OK. Replaced fan. All is sweet and lightness now ( till the next time). Thanks for the input.